Thanks a lot, Mark. Mine look great and I've got a nice variety. We may all have different definitions of "rainbow", but I've got a couple with 2-3 color bands. I've also got 2 or 3 that are basically white with a hint of yellow or green. I can't wait to see if they change color.
I've got some in the sand and some attached to low rockwork. I'm worried flow might be a bit much, but we'll see.
I'd be happy to trade with people if/when they start replicating.